Yamaha SILENT Piano YUS5SG Podręcznik konserwacji - Strona 11
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・Pedal sensor test 1A+3B+4C
Adjust the pedal sensor sounding position with the sensor adjustment screw.
The damper pedal is adjusted by measurement in the maintenance mode.
[Damper Pedal]
Pedal at rest
Pedal depressed slightly
Pedal half way down
Pedal at stroke end
[Soft Pedal]
Pedal at rest
Pedal depressed
Use the sensor adjustment screw to
adjust the point at which the soft
pedal sensor activates the buzzer.
[Sostenuto Pedal]
Pedal at rest
Pedal depressed slightly
1)SW Box Test
[Test start-up and termination]
Connect headphones and turn on the power.
Push test switch (SW) on the backside of the switch box, to start the test (press SW again to termina
・SW Box and Sensor unit communication test
When the test starts, the two units (Switch Box and Key Sensor) automatically
communicate with each other.
C major chord plays if communication is successful.
C minor chord plays if communication is unsuccessful.
The "Black Key Etude (Chopin)" plays continuously while the test is in progress.
Automatic communication between the units by the test startup displays the status
with a chord sound.
・AD test
Detects reverb knob rotation and damper pedal depth, and then produces a
chromatic scale.
During the test,
Rotating the reverb knob clockwise produces a chromatic scale from low to high
(counter clockwise rotation produces a chromatic scale from high to low).
Pressing the damper pedal produces a chromatic scale from low to high
(releasing the pedal produces the scale from high to low).
: No Buzzer sound
: Continuous tone (*1)
: Intermittent tone (*2)
: Quick intermittent tone (*3)
: No Buzzer sound
: Buzzer is sounded when the hammer rail is
at 2 or 3mm from the start position.
: No Buzzer sound
: Buzzer is sounded
Fig.17
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Fig.16